/*

  * Copyright (C) 2012 David Anderson

  *

  * This file is part of JITCraft.

  *

  * JITCraft is free software: you can redistribute it and/or modify it under

  * the terms of the GNU General Public License as published by the Free

  * Software Foundation, either version 3 of the License, or (at your option)

  * any later version.

  * 

  * Foobar is distributed in the hope that it will be useful, but WITHOUT ANY

  * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS

  * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

  *

  * You should have received a copy of the GNU General Public License along with

  * JITCraft. If not, see http://www.gnu.org/licenses/.

  */

 #ifndef _include_jitcraft_thread_h_

 #define _include_jitcraft_thread_h_

 #include "PoolAllocator.h"

 #include "Stack.h"

 namespace jc {

 class Zone

 {

     PoolAllocator pool_;

     Stack stack_;

     UnsafeStack unsafeStack_;

   public:

     bool initialize();

     PoolAllocator &pool() {

         return pool_;

     }

     Stack &stack() {

         return stack_;

     }

     UnsafeStack &unsafeStack() {

         return unsafeStack_;

     }

 };

 // In a multi-threaded system, this would be a TLS variable.

 // In the interest of simplicity, we are single-threaded for now.

 extern Zone SingleThreadedZone;

 static inline Zone *ZONE()

 {

     return &SingleThreadedZone;

 }

 class LocalTop

 {

     Top *prev_;

     Top &mine_;

   public:

     LocalTop(Top &mine)

       : mine_(mine),

         prev_(ZONE()->stack().top())

     {

         ZONE()->stack().setTop(&mine_);

     }

     ~LocalTop()

     {

         ZONE()->stack().setTop(prev_);

     }

 };

 }

 #endif // _include_jitcraft_thread_h_